I do not believe that this ironSource thing or the comments from the CEO will cause a real downfall of Unity but I do believe that VR is the area where Godot has the chance to sidestep the huge lead of Unity and shine as a real competitor.
Because the technology is still changing very rapidly and no one has too big a lead on others (especially with standalone headsets).
Godot even had support for Oculus hand tracking in late 2019 when it was not officially released for Unity and Unreal.
At the moment everyone manufacturer is building for Unity first and everything else second (if at all), but when OpenXR finally has established itself that will be a lot less of a factor
Even if you don’t go for godot as your main engine, the speed with which you can prototype is really nice.
Right now the most successful game made with Godot Engine is Cruelty Squad (https://store.steampowered.com/app/1388770/Cruelty_Squad/). Regardless of if you would call it “professional” or not, it was one of the most noted indie games of 2021, had great reviews, and probably was much more commercially successful than your average Unity/Unreal “professional” indie title (given how so many of them flop). Same goes for some highly successful RPG Maker games, which usually people would not call it a “commercial-quality” engine.
I think there’s a lesson here: don’t care that much if you’re using a “commercial” quality engine or not, just care if the engine will give the right tools to make the game that you envision.
Here's an absolutely beautiful commercial game made in Godot.
But even aside from that, I'd argue Godot probably had little to do with the quality of the port. There's ample evidence that you can make buggy games with any engine, and the Sonic franchise in particular seems to have a long running problem with SEGA pushing releases out half-baked.